When anything goes wrong, we just love a scapegoat, don’t we? Today’s scapegoat in the business world is David Ebersman, Facebook’s chief financial officer, who New York Times writer Andrew Ross Sorkin says is completely, solely, and utterly at fault for the social network’s underwhelming initial public offering and subsequent swoon in its stock price to less than half its IPO level.

Sorkin, as well as others, say Ebersman’s insistence on a higher stock price and especially on issuing more shares shortly before the offering were the key reason Facebook’s post-IPO shares not only failed to rise but steadily fell–vaporizing some $50 billion in shareholder value in the past 90 days.

But Ebersman is hardly the only culprit in the IPO. There’s also:

* Facebook’s underwriters, including Morgan Stanley and J.P. Morgan Chase. Not only did they go along with and even encourage the pre-IPO hype, but recently they cut their target prices for Facebook, contributing to today’s slide that knocked shares to under half the IPO level.

* Facebook investors. Business Insider’s Henry Blodget, who knows a little something about Internet stock dynamics, says investors willfully ignored both Facebook’s own warnings about advertising revenue uncertainties and CEO Mark Zuckerberg’s letter to, yes, investors, that he would focus on building Facebook’s services over maximizing its profits.

* Not least, CEO Mark Zuckerberg. After all, the buck (or in this case, 50 cents) stops here. While finances are probably at least third on the list of his concerns, behind Facebook’s services and its employees, a CEO ultimately is responsible for such a signature event in a company’s life.

Still, regardless of whom you might think is most culpable, in the end it probably will have little impact on Facebook’s prospects. That’s because there’s an even more fundamental reason to question the singling out of Ebersman: Perhaps Facebook’s IPO wasn’t really a debacle after all. …